ST LOUIS, MO - OCTOBER 09:  Republican presidential nominee Donald Trump listens during the town hall debate at Washington University on October 9, 2016 in St Louis, Missouri. This is the second of three presidential debates scheduled prior to the November 8th election.  (Photo by Scott Olson/Getty Images)
Scott Olson/Getty Images
ST LOUIS, MO - OCTOBER 09: Republican presidential nominee Donald Trump listens during the town hall debate at Washington University on October 9, 2016 in St Louis, Missouri. This is the second of three presidential debates scheduled prior to the November 8th election. (Photo by Scott Olson/Getty Images)
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Democratic presidential nominee former Secretary of State Hillary Clinton and Republican presidential nominee Donald Trump speak during the town hall debate at Washington University on October 9, 2016, in St. Louis.
Win McNamee/Getty
Democratic presidential nominee former Secretary of State Hillary Clinton and Republican presidential nominee Donald Trump speak during the town hall debate at Washington University on October 9, 2016, in St. Louis.
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ST LOUIS, MO - OCTOBER 09:  Republican presidential nominee Donald Trump shakes hands with Democratic presidential nominee former Secretary of State Hillary Clinton during the town hall debate at Washington University on October 9, 2016 in St Louis, Missouri. This is the second of three presidential debates scheduled prior to the November 8th election.  (Photo by Chip Somodevilla/Getty Images)
Chip Somodevilla/Getty Images
ST LOUIS, MO - OCTOBER 09: Republican presidential nominee Donald Trump shakes hands with Democratic presidential nominee former Secretary of State Hillary Clinton during the town hall debate at Washington University on October 9, 2016 in St Louis, Missouri. This is the second of three presidential debates scheduled prior to the November 8th election. (Photo by Chip Somodevilla/Getty Images)
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ST LOUIS, MO - OCTOBER 09:  Republican presidential nominee Donald Trump responds to a question during the town hall debate at Washington University on October 9, 2016 in St Louis, Missouri. This is the second of three presidential debates scheduled prior to the November 8th election.  (Photo by Scott Olson/Getty Images)
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ST LOUIS, MO - OCTOBER 09: Republican presidential nominee Donald Trump responds to a question during the town hall debate at Washington University on October 9, 2016 in St Louis, Missouri. This is the second of three presidential debates scheduled prior to the November 8th election. (Photo by Scott Olson/Getty Images)
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ST LOUIS, MO - OCTOBER 09:  Republican presidential nominee Donald Trump responds to a question during the town hall debate at Washington University on October 9, 2016 in St Louis, Missouri. This is the second of three presidential debates scheduled prior to the November 8th election.  (Photo by Chip Somodevilla/Getty Images)
Chip Somodevilla/Getty Images
ST LOUIS, MO - OCTOBER 09: Republican presidential nominee Donald Trump responds to a question during the town hall debate at Washington University on October 9, 2016 in St Louis, Missouri. This is the second of three presidential debates scheduled prior to the November 8th election. (Photo by Chip Somodevilla/Getty Images)
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Livestream, live updates and analysis from the second presidential debate between Hillary Clinton and Donald Trump on October 9, 2016, in St. Louis. Watch here and on CNN at 9 p.m. ET.